I talked to Kerry one of the owner's he is a great person. I told him I am having problems trying to figure out the RTK system he was on it within less than an hour with the receipt to send it back so that he can look at it that is one heck of a response. It's The best response I ever got from my drone dealer I think he is a great person and cares about his customers I am very lucky to a found Multicopter Warehouse. They are great Company and very loyal to their customers I am very impressed and I will do all my shopping there. Thank you again for your help.